[Vintage-Audio] Tube amps with no load

Sun Mar 2 20:40:01 2003

But without the rectifier tube there will be no DC at
any potential... so once again.  Why bother???

----- Original Message -----
From: "Duane Fischer, W8DBF" <[email protected]>
To: <[email protected]>
Sent: Sunday, March 02, 2003 8:12 PM
Subject: Re: [Vintage-Audio] Tube amps with no load

> You remove the rectifier tube OM -
>
>
>
> ----------
> From: Robert  J.  McKee <[email protected]>
> To: [email protected]
> Subject: Re: [Vintage-Audio] Tube amps with no load
> Date: Sunday, March 02, 2003 8:09 PM
>
> Can you explain what good it does to bring it up slowly
> when you have a tube rectifier?  I can understand it if
> the rectification is solid state so you are truly bringing
> it up slowly... reforming the power supply capacitors.
> It would seem that the way to reform them would be to
> use a variable DC supply to do the reforming.
> Looking for the pros and cons of each.
> Bob McKee
>
>
> ----- Original Message -----
> From: "Duane Fischer, W8DBF" <[email protected]>
> To: <[email protected]>
> Sent: Sunday, March 02, 2003 5:05 PM
> Subject: Re: [Vintage-Audio] Tube amps with no load
>
>
> > The real issue, may be in powering up an old amplifier
that
> has sat idle for
> > several or more years. Unless it is brought up slowly on a
> Variac to allow the
> > capacitors to reform, Kapow! "Sold as is, a non-smoker, so
> not sure where that
> > slight smell of smoke is coming from."
> >
> > DBF
> >
> >
> > ----------
> > From: [email protected]
> > To: [email protected]
> > Subject: Re: [Vintage-Audio] Tube amps with no load
> > Date: Sunday, March 02, 2003 11:55 AM
> >
> > No problem at all....
> >
> > It's only when there's an audio signal going through the
amp
> that there's
> > a problem....
> >
> > Don't forget a transformer is an AC device.  The load is
> only reflected
> > back to the tube during an AC excursion.  There's no
problem
> or
> > refelction with no AC, when the amplifier is at idle.
> >
> > Ed K1ZOK
> >
> > On Sun, 2 Mar 2003 10:28:03 -0600 "Steven K. Wenger"
> <[email protected]>
> > writes:
> > > Is it just me, or does anyone else cringe when someone
on
> eBay writes
> > > the amp's tubes light up but I have no way of testing
it?
> There is a
> > > Fisher X200 amp on eBay right now. You can actually see
> the amp's
> > > line cord plugged into an extension cord, the tube's
> filaments are
> > > on, and no speakers are connected.
> > >
> > >
> >
> >
>
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